<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS隐藏元素</title>
    <style>
        .box {
            width: 200px;
            height: 200px;
        }
        .box1{
            background-color: skyblue;
            /* display: none; */ /* 不占位*/
            visibility: hidden; /* 占位*/
        }
        .box2{
            background-color: orange;
        }
    </style>
</head>
<body>
    <div class="box box1">
        1
    </div>
    <div class="box box2">
        2
    </div>
</body>
</html>